Home / 12,480.65-18,718.85-4,159.79

Finding the Fourth Proportional to 12,480.65, 18,718.85 and 4,159.79

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Solution

The fourth proportional to 12,480.65, 18,718.85 and 4,159.79 is: 6,238.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.65 : 18,718.85 = 4,159.79 : x
  2. Step 2: Convert to fraction form
    12,480.65/18,718.85 = 4,159.79/x
  3. Step 3: Cross multiply
    12,480.65x = 18,718.85 × 4,159.79
  4. Step 4: Simplify right side
    12,480.65x = 77,866,542.24
  5. Step 5: Solve for x
    x = 77,866,542.24/12,480.65
  6. Step 6: Final answer
    x = 6,238.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.